and why Kidd let to cut his arm? and when I said something about Barto?
I only said than if he said shanks pirates and not shanks and he lost it's clear because he lost his arm

I only said than if he said shanks pirates and not shanks and he lost it's clear because he lost his arm
He didn't say "Shanks did cut my arm" or "A Commander of the RHP cut my arm" or "I sacrified my arm" or "I did bet my arm". He said "I lost my arm during a battle with the RHP", he didn't say how, why or from who. Everything is still a mistery (and the fact that was brought up agains shows that Oda wants to clarify it in the future).
So yeah, you are assuming as certain or clear something that Oda kept vague on purpose.
As for Barto I was refering to the clown post of @Lor D. Coast that you liked
Zoro is the embodiment of a great pirate if we consider his skill mixed with his goal driving and hard work on top of pirate attitude for conquest.
Go outside Beta